Mössbauer spectra obtained using β − γ coincidence method after Mn implantation into LiH and LiD.

Highly energetic Mn ( T = 1.45 m) was generated by nuclear projectile fragmentation in a heavy-ion accelerator, and implanted into lithium hydride (LiH) and lithium deuteride (LiD) at 578 K. Mössbauer spectroscopy with β − γ coincidence detection was then carried out on the Fe obtained from βdecay of the Mn to study the time dependence of the site distributions and coordination environments of dilute Fe atoms implanted in the LiH and LiD. The results suggest that the Fe atoms can substitute for either the Li and H or D atoms within 100 ns. Additionally, the displacement behavior of the substitutional Fe atoms on the lattice sites is discussed. [ABSTRACT FROM AUTHOR]